diff --git a/babybuddy/tests/tests_site_settings.py b/babybuddy/tests/tests_site_settings.py
new file mode 100644
index 00000000..368e2d7b
--- /dev/null
+++ b/babybuddy/tests/tests_site_settings.py
@@ -0,0 +1,73 @@
+# -*- coding: utf-8 -*-
+from django.contrib.auth import get_user_model
+from django.core.management import call_command
+from django.test import Client as HttpClient, TestCase
+
+from faker import Faker
+
+from core.models import Sleep
+
+
+class SiteSettingsTestCase(TestCase):
+    @classmethod
+    def setUpClass(cls):
+        super(SiteSettingsTestCase, cls).setUpClass()
+        fake = Faker()
+        call_command("migrate", verbosity=0)
+        call_command("fake", verbosity=0)
+
+        cls.c = HttpClient()
+
+        fake_user = fake.simple_profile()
+        cls.credentials = {
+            "username": fake_user["username"],
+            "password": fake.password(),
+        }
+        cls.user = get_user_model().objects.create_user(
+            is_superuser=True, is_staff=True, **cls.credentials
+        )
+
+    def test_default_settings(self):
+        self.c.login(**self.credentials)
+        page = self.c.get("/settings/")
+        self.assertEqual(page.status_code, 200)
+        self.assertEqual(
+            page.context["form"]["core.models__Sleep__nap_start_max"].value(),
+            "18:00:00",
+        )
+        self.assertEqual(
+            page.context["form"]["core.models__Sleep__nap_start_min"].value(),
+            "06:00:00",
+        )
+
+    def test_nap_start_settings(self):
+        self.c.login(**self.credentials)
+        self.assert_naps()
+        params = {
+            "core.models__Sleep__nap_start_max": "20:00:00",
+            "core.models__Sleep__nap_start_min": "09:00:00",
+        }
+        page = self.c.post("/settings/", params, follow=True)
+        self.assertEqual(page.status_code, 200)
+        self.assertEqual(
+            Sleep.settings.nap_start_max.strftime("%H:%M:%S"),
+            params["core.models__Sleep__nap_start_max"],
+        )
+        self.assertEqual(
+            Sleep.settings.nap_start_min.strftime("%H:%M:%S"),
+            params["core.models__Sleep__nap_start_min"],
+        )
+        self.assert_naps()
+
+    def assert_naps(self):
+        """
+        Asserts sleep instances filtered with nap start min and max match nap instances.
+        """
+        instances = Sleep.objects.filter(
+            start__time__range=(
+                Sleep.settings.nap_start_min.strftime("%H:%M:%S"),
+                Sleep.settings.nap_start_max.strftime("%H:%M:%S"),
+            )
+        )
+        naps = Sleep.naps.all()
+        self.assertQuerySetEqual(instances, naps)